209500983 has 18 divisors (see below), whose sum is σ = 305481696. Its totient is φ = 138355392.

The previous prime is 209500981. The next prime is 209500987. The reversal of 209500983 is 389005902.

It is not a de Polignac number, because 209500983 - 2¹ = 209500981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209500981) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 114010 + ... + 115832.

Almost surely, 2^209500983 is an apocalyptic number.

209500983 is a deficient number, since it is larger than the sum of its proper divisors (95980713).

209500983 is a wasteful number, since it uses less digits than its factorization.

209500983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2055 (or 1939 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 209500983 is about 14474.1487832618. The cubic root of 209500983 is about 593.9210094602.

The spelling of 209500983 in words is "two hundred nine million, five hundred thousand, nine hundred eighty-three".